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uses BDE;

type
  TFelderListe = class(TDBDataSet)
  private
    FTableName: string;
  protected
    function CreateHandle: HDBICur; override;
    function GetRecordCount: LongInt; override;
  public
    property TableName: string read FTableName write FTableName;
  end;

{ TFelderListe }

function TFelderListe.CreateHandle: HDBICur;
var
  STableName        : array[0..255] of Char;
begin
  AnsiToNative(DBLocale, FTableName, STableName, SizeOf(STableName));
  Check(DbiOpenFieldList(DBHandle, STableName, nil, false, result));
end;

function TFelderListe.GetRecordCount: LongInt;
begin
  check(dbiGetRecordCount(handle, result));
end;

procedure TForm1.FormCreate(Sender: TObject);
var
  fl                : TFelderListe;
begin
  fl := TFelderListe.Create(self);
  fl.TableName := 'xxx.dbf';
  fl.Active := true;
  DataSource1.DataSet := FL;
end;